You’re kidding? Just how did they violate the attorney-client privilege? They gave no details or even discussed Zimmerman’s case.
They said they’d lost contact with him, and since breaking off communication, Zimmerman has made two serious public communications errors for someone in his position. They are withdrawing. That becomes a matter of public record the second the withdrawal motion is filed in the court. No attorney-client privilege involved.
For one thing they speculated about their clients mental state on national television. The mere fact they held a news conference to announce their departure was an ethical breech.